NXP Semiconductors HEF4075BT,652

Overview

HEF4075BT,652 from NXP Semiconductors (formerly Philips) is a triple 3-input OR gate IC in the HE4000B LOCMOS logic family, operating at supply voltages from 3 V to 15 V, with propagation delays as low as 12 ns at 15 V and 50 pF load, fully buffered outputs for high noise immunity, and designed for digital control logic in industrial timing and signal routing applications.

For engineers reviewing the HEF4075BT,652 datasheet, HEF4075BT,652 pinout, HEF4075BT,652 application, or HEF4075BT,652 equivalent, key selection criteria include supply voltage range, output drive capability, propagation delay vs. load capacitance, input transition time tolerance, and SO-14 package compatibility with surface-mount production workflows.

Technical Context

The HEF4075BT,652 implements three independent positive-logic 3-input OR gates using LOCMOS (Low-power CMOS) technology, ensuring static power consumption near zero and dynamic dissipation scaling with input/output frequency and load capacitance. Each gate features fully buffered outputs to maintain consistent impedance regardless of switching pattern.

Propagation delay is specified across 5 V, 10 V, and 15 V supply rails with CL = 50 pF and input transition times ≤20 ns; output transition times follow predictable linear relationships with load capacitance, enabling accurate timing budgeting in synchronous logic designs.

Key Specifications

Pinout & Package

HEF4075BT,652 is housed in a 14-lead small-outline (SO) plastic package (SOT108-1), compatible with standard surface-mount reflow processes and IPC-7351B SOIC-14 footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar OR gate applications.

Compared with CD4075BM96 and 74HC1OR3, the HEF4075BT,652 uniquely balances wide supply range (3–15 V), predictable delay modeling, and SO-14 surface-mount compatibility - making it optimal for industrial equipment where voltage flexibility and long-term component availability matter.

Availability

HEF4075BT,652 is available at Aetrix Electronics and suitable for industrial control logic, power sequencing monitors, legacy bus interfaces, and test fixture signal conditioning requiring stable component supply and long-lifecycle support.

Supply support for HEF4075BT,652 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering logic and analog design heritage.

The HE4000B LOCMOS logic family - including the HEF4075BT,652 - was engineered for robust, low-power digital control in harsh environments where wide supply range, noise immunity, and long-term reliability are mandatory.

FAQ

What logic family does the HEF4075BT,652 belong to?

The HEF4075BT,652 belongs to the HE4000B LOCMOS (Low-power CMOS) logic family developed by Philips (now NXP). It features CMOS-level static power consumption, wide 3 V to 15 V supply operation, and fully buffered outputs. The HEF4075BT,652 maintains compatibility with older 4000-series logic while offering improved noise immunity and timing predictability compared to unbuffered variants.

Is the HEF4075BT,652 pin-compatible with other 4075 variants like HEF4075BD or CD4075?

Yes - the HEF4075BT,652 shares the same 14-pin SO (SOT108-1) pinout as defined in the HE4000B family specification, matching the functional pin assignment of HEF4075BD (cerdip) and CD4075BM96 (DIP). All variants implement identical triple 3-input OR logic with identical pin functions, though package thermal and mechanical properties differ.

What is the maximum operating frequency supported by the HEF4075BT,652?

The HEF4075BT,652 does not have a clock; it is combinational logic. Its usable toggle rate depends on propagation delay and system loading. At 15 V and 50 pF load, tPLH/tPHL ≤12 ns supports reliable operation up to ~30 MHz in feedback-free paths. For cascaded or loaded paths, actual maximum frequency must be derived from measured delay plus setup/hold margins. The HEF4075BT,652 datasheet specifies no maximum clock frequency because it has no internal clock.

Can the HEF4075BT,652 interface directly with 5 V TTL devices?

Yes - the HEF4075BT,652 outputs meet TTL voltage thresholds when operated at ≥4.5 V supply, and its inputs recognize TTL logic levels across its full 3–15 V range. At VDD = 5 V, VOH ≥ 4.4 V and VOL ≤ 0.4 V under 1 mA load, satisfying TTL VIH/VIL requirements. The HEF4075BT,652 thus enables direct interfacing without level shifters in mixed-logic systems.

Does the HEF4075BT,652 require external pull-up or pull-down resistors on unused inputs?

Yes - all unused inputs of the HEF4075BT,652 must be terminated to VDD or VSS to prevent floating nodes, which cause increased supply current, erratic output behavior, and EMI susceptibility. Leaving inputs unconnected violates the HEF4075BT,652's absolute maximum ratings and may degrade long-term reliability. Tie-unused inputs directly to rail or via ≤10 kΩ resistor.